Alert archive / California / Beach Hazards Statements in 2023
Beach Hazards Statement 16, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Nov 23, 2023, 5:42 PM PST for 6 counties in California. It took effect at Nov 24, 2023, 10:00 PM PST. It was in force for 38 hr.
The area
The counties it named.
The facts
- Issued
- Nov 23, 2023, 5:42 PM PST (01:42 UTC)
- In effect from
- Nov 24, 2023, 10:00 PM PST
- Expired
- Nov 26, 2023, 12:00 PM PST
- In force
- 38 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties City and County of San Francisco, CA, Marin County, CA, Monterey County, CA, San Mateo County, CA, Santa Cruz County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 53 km from the middle of the area, began a volume at 01:45 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Oakland, CA (KOAK), launched 00:00Z, 1.7 hours before the alert went out and 26 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2241 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
553 WHUS46 KMTR 240142 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 542 PM PST Thu Nov 23 2023 CAZ006-505-509-529-530-241330- /O.NEW.KMTR.BH.S.0016.231125T0600Z-231126T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 542 PM PST Thu Nov 23 2023 ...BEACH HAZARDS STATEMENT IN EFFECT FROM FRIDAY EVENING THROUGH SUNDAY MORNING... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From Friday evening through Sunday morning. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath.. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves between larger sets of waves. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
9 follow-up statements
724 WHUS46 KMTR 240909 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 109 AM PST Fri Nov 24 2023 CAZ006-505-509-529-530-242100- /O.CON.KMTR.BH.S.0016.231125T0600Z-231126T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 109 AM PST Fri Nov 24 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM THIS EVENING THROUGH SUNDAY MORNING... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From this evening through Sunday morning. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves between larger sets of waves. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
122 WHUS46 KMTR 242032 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1232 PM PST Fri Nov 24 2023 CAZ006-505-509-529-530-250845- /O.CON.KMTR.BH.S.0016.231125T0600Z-231126T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1232 PM PST Fri Nov 24 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 10 PM PST THIS EVENING THROUGH SUNDAY MORNING... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...From this evening through Sunday morning. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves between larger sets of waves. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
428 WHUS46 KMTR 250724 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1124 PM PST Fri Nov 24 2023 CAZ006-505-509-529-530-252100- /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T1600Z/ San Francisco- Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1124 PM PST Fri Nov 24 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY MORNING... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...Tonight through Sunday morning. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves between larger sets of waves. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean. && $$
054 WHUS46 KMTR 251511 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 711 AM PST Sat Nov 25 2023 CAZ006-252315- /O.NEW.KMTR.CF.Y.0008.231125T1511Z-231125T1800Z/ /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T1600Z/ San Francisco- 711 AM PST Sat Nov 25 2023 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING... ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY MORNING... * WHAT...For the Coastal Flood Advisory, minor coastal flooding. For the Beach Hazards Statement, increased threat of sneaker waves expected. * WHERE...San Francisco County. * WHEN...For the Coastal Flood Advisory, until 10 AM PST this morning. For the Beach Hazards Statement, through Sunday morning. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. For the Beach Hazards Statement; large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. Additionally, tidal levels are running a half-foot above predictions and therefore likely to produce minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Remain out of the water to avoid hazardous swimming conditions. && $$ CAZ506-508-251800- /O.NEW.KMTR.CF.Y.0008.231125T1511Z-231125T1800Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- 711 AM PST Sat Nov 25 2023 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING... * WHAT...Minor coastal flooding. * WHERE...North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...Until 10 AM PST this morning. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running a half-foot above predictions and therefore likely to produce minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && $$ CAZ505-509-529-530-252315- /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T1600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 711 AM PST Sat Nov 25 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY MORNING... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...This morning through Sunday morning. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
092 WHUS46 KMTR 251740 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 940 AM PST Sat Nov 25 2023 CAZ006-260145- /O.EXP.KMTR.CF.Y.0008.000000T0000Z-231125T1800Z/ /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T1600Z/ San Francisco- 940 AM PST Sat Nov 25 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY MORNING... ...COASTAL FLOOD ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco County. * WHEN...For the Coastal Flood Advisory, until 10 AM PST this morning. For the Beach Hazards Statement, through Sunday morning. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$ CAZ506-508-251845- /O.EXP.KMTR.CF.Y.0008.000000T0000Z-231125T1800Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- 940 AM PST Sat Nov 25 2023 ...COASTAL FLOOD ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING... Water levels continue to fall. $$ CAZ505-509-529-530-260145- /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T1600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 940 AM PST Sat Nov 25 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY MORNING... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...This morning through Sunday morning. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
969 WHUS46 KMTR 260118 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 518 PM PST Sat Nov 25 2023 CAZ006-261330- /O.NEW.KMTR.CF.Y.0009.231126T1500Z-231126T2000Z/ /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T1600Z/ San Francisco- 518 PM PST Sat Nov 25 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY MORNING... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 AM TO NOON PST SUNDAY... * WHAT...For the Beach Hazards Statement, increased risk of sneaker waves. For the Coastal Flood Advisory, minor coastal flooding expected. * WHERE...San Francisco County. * WHEN...For the Beach Hazards Statement, through Sunday morning. For the Coastal Flood Advisory, from 7 AM to noon PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running about a third to a half foot above predictions. By high tide Sunday morning (peaking at around 10 AM PST), there will likely to be more minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Remain out of the water to avoid hazardous swimming conditions. && $$ CAZ506-508-261330- /O.NEW.KMTR.CF.Y.0009.231126T1500Z-231126T2000Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- 518 PM PST Sat Nov 25 2023 ...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 AM TO NOON PST SUNDAY... * WHAT...Minor coastal flooding expected. * WHERE...North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 7 AM to noon PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running about a third to a half foot above predictions. By high tide Sunday morning (peaking at around 10 AM PST), there will likely to be more minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && $$ CAZ505-509-529-530-261330- /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T1600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 518 PM PST Sat Nov 25 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY MORNING... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...This morning through Sunday morning. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
749 WHUS46 KMTR 260907 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 107 AM PST Sun Nov 26 2023 CAZ006-261715- /O.EXT.KMTR.BH.S.0016.000000T0000Z-231126T2000Z/ /O.CON.KMTR.CF.Y.0009.231126T1500Z-231126T2000Z/ San Francisco- 107 AM PST Sun Nov 26 2023 ...BEACH HAZARDS STATEMENT NOW IN EFFECT UNTIL NOON PST TODAY... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO NOON PST TODAY... * WHAT...For the Beach Hazards Statement, increased risk of sneaker waves. For the Coastal Flood Advisory, minor coastal flooding expected. * WHERE...San Francisco County. * WHEN...For the Beach Hazards Statement, until noon PST today. For the Coastal Flood Advisory, from 7 AM this morning to noon PST today. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running about a third to a half foot above predictions. By high tide Sunday morning (peaking at around 10 AM PST), there will likely to be more minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Remain out of the water to avoid hazardous swimming conditions. && $$ CAZ506-508-261715- /O.CON.KMTR.CF.Y.0009.231126T1500Z-231126T2000Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- 107 AM PST Sun Nov 26 2023 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO NOON PST TODAY... * WHAT...Minor coastal flooding expected. * WHERE...North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 7 AM this morning to noon PST today. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running about a third to a half foot above predictions. By high tide Sunday morning (peaking at around 10 AM PST), there will likely to be more minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && $$ CAZ505-509-529-530-261715- /O.EXT.KMTR.BH.S.0016.000000T0000Z-231126T2000Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 107 AM PST Sun Nov 26 2023 ...BEACH HAZARDS STATEMENT NOW IN EFFECT UNTIL NOON PST TODAY... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...Until noon PST today. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
845 WHUS46 KMTR 260924 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 124 AM PST Sun Nov 26 2023 CAZ006-262000- /O.CON.KMTR.CF.Y.0009.231126T1500Z-231126T2000Z/ /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T2000Z/ San Francisco- 124 AM PST Sun Nov 26 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL NOON PST TODAY... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO NOON PST TODAY... * WHAT...For the Beach Hazards Statement, increased risk of sneaker waves. For the Coastal Flood Advisory, minor coastal flooding expected. * WHERE...San Francisco County. * WHEN...For the Beach Hazards Statement, until noon PST today. For the Coastal Flood Advisory, from 7 AM this morning to noon PST today. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running about a third to a half foot above predictions. By high tide Sunday morning (peaking at around 10 AM PST), there will likely to be more minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Remain out of the water to avoid hazardous swimming conditions. && $$ CAZ506-508-262000- /O.CON.KMTR.CF.Y.0009.231126T1500Z-231126T2000Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- 124 AM PST Sun Nov 26 2023 ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO NOON PST TODAY... * WHAT...Minor coastal flooding expected. * WHERE...North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 7 AM this morning to noon PST today. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running about a third to a half foot above predictions. By high tide Sunday morning (peaking at around 10 AM PST), there will likely to be more minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && $$ CAZ505-509-529-530-262000- /O.CON.KMTR.BH.S.0016.000000T0000Z-231126T2000Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 124 AM PST Sun Nov 26 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL NOON PST TODAY... * WHAT...Increased threat of sneaker waves expected. * WHERE...San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, Northern Monterey Bay and Southern Monterey Bay and Big Sur Coast Counties. * WHEN...Until noon PST today. * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...Sneaker wave threat will be highest for west to northwest facing beaches. In addition to the sneaker wave threat, high astronomical tides are also expected this weekend, which can cause further runup along the beaches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
567 WHUS46 KMTR 261939 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1139 AM PST Sun Nov 26 2023 CAZ006-271300- /O.EXP.KMTR.CF.Y.0009.000000T0000Z-231126T2000Z/ /O.EXP.KMTR.BH.S.0016.000000T0000Z-231126T2000Z/ /O.NEW.KMTR.CF.Y.0010.231127T1600Z-231127T2100Z/ San Francisco- 1139 AM PST Sun Nov 26 2023 ...COASTAL FLOOD ADVISORY IN EFFECT FROM 8 AM TO 1 PM PST MONDAY... ...COASTAL FLOOD ADVISORY WILL EXPIRE AT NOON PST TODAY... ...BEACH HAZARDS STATEMENT WILL EXPIRE AT NOON PST TODAY... * WHAT...Minor coastal flooding expected. * WHERE...San Francisco County. * WHEN...From 8 AM to 1 PM PST Monday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running about a third to a half foot above predictions. By high tide Monday morning (peaking at around 10:30 AM PST), there will likely to be more minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && $$ CAZ506-508-271300- /O.EXP.KMTR.CF.Y.0009.000000T0000Z-231126T2000Z/ /O.NEW.KMTR.CF.Y.0010.231127T1600Z-231127T2100Z/ North Bay Interior Valleys-San Francisco Bay Shoreline- 1139 AM PST Sun Nov 26 2023 ...COASTAL FLOOD ADVISORY IN EFFECT FROM 8 AM TO 1 PM PST MONDAY... ...COASTAL FLOOD ADVISORY WILL EXPIRE AT NOON PST TODAY... * WHAT...Minor coastal flooding expected. * WHERE...North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 8 AM to 1 PM PST Monday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are running about a third to a half foot above predictions. By high tide Monday morning (peaking at around 10:30 AM PST), there will likely to be more minor coastal flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && $$ CAZ505-509-529-530-262045- /O.EXP.KMTR.BH.S.0016.000000T0000Z-231126T2000Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- Southern Monterey Bay and Big Sur Coast- 1139 AM PST Sun Nov 26 2023 ...BEACH HAZARDS STATEMENT WILL EXPIRE AT NOON PST TODAY... Wave heights have subsided to below criteria. $$
What forecasters said that day
The local office's own words before this beach hazards statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this beach hazards statement went out at Nov 23, 3:20 PM PST, 2 hours 22 minutes earlier.
Area forecast discussion, Nov 23, 3:20 PM PST, 2 hours 22 minutes before
Area Forecast Discussion
National Weather Service San Francisco CA
320 PM PST Thu Nov 23 2023
...New AVIATION, MARINE...
.SYNOPSIS...
Issued at 1132 PM PST Wed Nov 22 2023
Dry and mild today. Breezy winds develop in the hills tonight into
Friday. Cold overnight readings for Friday and Saturday morning
with frost and freezing conditions likely in the coldest interior
valleys.
&&
.SHORT TERM...
(This evening through Friday)
Issued at 115 PM PST Thu Nov 23 2023
A few clouds continue to hug the Monterey Peninsula and Big Sur
coast, but they are gradually thinning as the decaying front
moves through. Expect this trend to continue this
afternoon/evening. Elsewhere, wall to wall sunshine blankets the
region with mild temperatures. Not a bad afternoon for a holiday,
especially if you're traveling or spending some time outdoors.
Tonight through Friday: An upper level low will deepen over the
Great Basin. At the surface however, high pressure will build
over OR/WA/NorCal/NV with lower pressure along the CA coast. This
surface pressure setup/orientation will allow for offshore flow.
The SFO-WMC and RDD-SAC are both trending in the direction that
promotes northerly/offshore flow. The gradients max out later
tonight/early Friday with gusty winds over the North and East Bay
higher terrain, but it won't be strong enough to warrant a wind
advisory. That being said, still looking for 35-50 mph above 2500
feet. Mt St Helena could see a gust over 50 mph by Friday
morning. The offshore flow will also usher in drier air limiting
any stratus/low clouds like we had near Monterey Thursday morning.
Outside of windy areas, conditions will be ideal for colder
overnight lows. This will be most notable across interior
Monterey/San Benito counties initially. A Frost Advisory remains
in effect as temperatures drop below 36 degrees tonight.
Despite offshore flow and some sunshine on Friday, temperatures
will actually drop a few degrees as cooler air moves in from the
north. Highs on Friday will be closer seasonal average and in the
upper 50s to 60s.
&&
.LONG TERM...
(Friday night through next Wednesday)
Issued at 145 PM PST Thu Nov 23 2023
Offshore eases by Friday night, but still remains offshore flow
with mostly clear skies. Clear skies and lighter winds will set
the stage for an even colder night. A Freeze Watch remains for
interior Monterey/San Benito where lows plummet to the upper 20s
to low 30s. This will likely need to be converted with the next
forecast package to a Freeze Warning. A Frost Advisory will also
likely be needed for the North Bay Valleys as temperatures drop
below 36 degrees. Elsewhere will be chilly with lows in the mid
30s to mid 40s. Saturday night into Sunday morning looks cold as
well so frost/freeze products may be needed again for the North
Bay Valleys and interior Monterey/San Benito. Given that this
will be a multi-day cold snap at night think of people, pets, and
pipes. Not a lot of change in the overall sensible weather
heading into next week with seasonable daytime temperatures and
chilly overnights.
Still looks like the storm door begins to open at the end of the
month and remains open into December. Current forecast does bring
some showers back to the region the middle of next week.
&&
.AVIATION...
(00Z TAFS)
Issued at 319 PM PST Thu Nov 23 2023
VFR throughout the region and TAF period, with the exception of some
lingering coastal stratus on the southern coast of Monterey County
that is expected to clear within the next few hours. Breezy
northwest flow pattern is developing now. Across the northern half
of the region, breezy winds continue through the evening,
potentially into the mid-morning on Friday. LLWS concerns are
present tonight across the North Bay, and to a lesser extent in the
East Bay, where wind shear magnitudes are not intense enough to
include in the TAFs. Winds diminish tonight in the southern half of
the region and switch to a light offshore flow across the Central
Coast. North to northwest flow resumes on Friday afternoon.
Vicinity of SFO...VFR through the TAF period. Northwest flow
continues through the early morning hours, when winds diminish and
turn north-northeasterly. Northwest flow returns Friday afternoon
and turns northeast later in the evening.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...Nearly high confidence in VFR through the
TAF period. Breezy onshore flow through the evening, when light
offshore flow develops. Northwest flow returns Friday afternoon.
&&
.MARINE...
(Tonight through next Tuesday)
Issued at 319 PM PST Thu Nov 23 2023
Near gale force northerly winds persist across the northern outer
waters, while fresh to strong northerly breezes persist generally
south of Point Reyes through the day today. Gusty northerly winds
are also possible near the Golden Gate Bridge late tonight. Gale
force northwesterly gusts are likely in the northern outer waters
through Friday morning with steep wind waves and hazardous
conditions. A moderate period northwest swell will continue to
build through the end of the week with a series of long period
northwest swell trains expected to propagate through the waters
through the weekend.
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Frost Advisory from 4 AM to 10 AM PST Friday for CAZ516-518.
Freeze Watch from Friday evening through Saturday morning for
CAZ516-518.
PZ...Small Craft Advisory from 9 PM this evening to 9 AM PST Friday
for PZZ530.
Small Craft Advisory until 3 AM PST Friday for PZZ540.
Small Craft Advisory until 9 PM PST this evening for PZZ565.
Gale Warning until 9 AM PST Friday for PZZ570.
Small Craft Advisory until 3 PM PST Friday for PZZ575.
&&
SHORT TERM...MM
LONG TERM....MM
AVIATION...DialH
MARINE...McCorkle
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www.youtube.com/nwsbayareaThe office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 24, 12:35 AM PST | Frost Advisory | MTR | Marin, Napa, Sonoma | 33 hr |
| Nov 24, 12:35 AM PST | Freeze Warning | MTR | Monterey, San Benito | 33 hr |
| Nov 24, 8:56 AM PST | Freeze Watch | MTR | Marin, Monterey, Napa, San Benito, Sonoma | 15 hr |
| Nov 24, 2:41 PM PST | Small Craft Advisory | MTR | 42 hr |
Nearby
Beach Hazards Statements in California, 2023Every beach hazards statement in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.